Photo Flash: Sneak Peek at Adam Lambert's GLEE Debut!

Adam Lambert will guest star on the next episode of Glee titled 'A Lady or a Gaga'. The episode airs November 7th at 9/8c on FOX. E! just revealed new photos of Lambert on GLEE. Check them out below!

The episode finds the students of McKinley High trying to discover themselves as artists and singers. Featured songs include hit singles from music's hottest albums, Lady Gaga's "Applause" and Katy Perry's "Roar."

Also, Sue and Will are back in action, waging all-out war on each other while Kurt and Santana hold auditions and are blown away by Lambert's performance.